package classes;

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.IOException;
import java.io.PrintWriter;
import java.util.Set;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.hibernate.EntityMode;
import org.hibernate.Session;
import org.hibernate.cfg.Configuration;
import org.hibernate.criterion.Restrictions;
import pojo.BookHasOrderId;

/**
 *
 * @author DELL
 */
public class Add2Cart extends HttpServlet {

    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
                Session hSession = new Configuration().configure().buildSessionFactory().openSession();
        hSession.beginTransaction();
        pojo.Customer c = (pojo.Customer) request.getSession(false).getAttribute("user");
        if (request.getParameter("isbn") != null) {
            try {
                pojo.Book book =  (pojo.Book) hSession.createCriteria(pojo.Book.class).add(Restrictions.eq("isbn", Integer.parseInt(request.getParameter("isbn")))).uniqueResult();
                request.setAttribute("book",book);
                pojo.BookHasOrder bho = new pojo.BookHasOrder(new BookHasOrderId(book.getIsbn(),c.getCartOrder().getId()), c.getCartOrder(), book, 1);
                c.getCart().add(bho);
                hSession.merge(c);
                hSession.merge(book);
                hSession.merge(bho);
                request.getSession(false).setAttribute("cart",c.getCart());
            } catch (Exception ex) {
            }
        }

        hSession.close();
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
